STINNER Victor <[email protected]> added the comment:
More "real world" example using cinder which imports 220 modules (ctypes is
used to simulate a crash):
---------------
$ ./python -m venv env
$ env/bin/python -m pip install wheel
$ env/bin/python -m pip install cinder
$ env/bin/python -X dev -c 'import cinder, ctypes, sys;
print(f"{len(sys.modules)=}"); print(); ctypes.string_at(0)'
(...)
len(sys.modules)=220
Fatal Python error: Segmentation fault
Current thread 0x00007fc4a88e0740 (most recent call first):
File "/home/vstinner/python/master/Lib/ctypes/__init__.py", line 517 in
string_at
File "<string>", line 1 in <module>
Extension modules: greenlet._greenlet, __original_module__thread,
__original_module_select, __original_module_time, _cffi_backend (total: 5)
Erreur de segmentation (core dumped)
---------------
cinder only uses 2 third party extension modules (on a total of 220 modules):
greenlet and cffi.
Note: __original_xxx modules are aliases of stdlib modules created by eventlet
monkey patching.
So if cinder does crash, I suggest to look at Python, but *also* look at these
2 extensions ;-)
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<https://bugs.python.org/issue42923>
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